Pump-piston.



A. M. PRINCE & L. GOSGIA.

PUMP PISTON.

APPLIOATIQN FILED MAY13, 1911.

' Patented Feb. 20, 1912.

Attorney States, residing, respectively, at Y pump pump cylinders 1 and"3 near their upper usual in pumps.

-State of 'lenne-ssee, have invented certain .vented from twisting orjamming in the claimed.

"to adischarge spout 10.

of the pistons has connected toitb a pivot 14 a series of disks 18, 19,20,, 21 and 22 ofwhich the upper and lower disks 18 and'22 are ofmetalwhile the intermediate disks j UNITED STATES PATENT OFFICE.

ADONIS M. PRINCE, OF WILMINGTON, NORTH CAROLINA, AND LOUIiA. GOSCIA, OF

' MEMPHIS, TENNESSEE.

PUMP-PISTON.

To all whom 'ttmay concern:

Be it known that we, Anoms M. PniNoE and Loom. Cosom, citizens of theUnited lfilmington, county of New Hanover, State of North Carolina, andMemphis, county of Shelby,

new and useful Improvements in Pump-Pistons, of which the following is adescription, reference being had to the accompanying drawings, forming apart hereof.

Our invention relates topumps and has for its object to provide means bywhich the travel of the piston in the pump cylinder shall be facilitatedand the piston be precylinder.

With this object in vieu our invention consists in the construction andcombination of elements hereinafter described and Referring to thedrawings: Figure 1 is .a vertical sectional view of a double actionhaving pistons embodying our invention and Fig. 2 is a. horizontalcrosssectional view on line 2-2 of Fig. 1. p

In the drawings 1 and 3 are the cylinders of a double action pump thecylinders each having at its lower 'end an inlet opening 4 controlled byan upwardly opening valve 5 of usual construction. To'the inlet valvespassages '6 lead from a pi e 7 leading to the well or other source 6supply. In the ends are-discharge. openings'S and. 9 leading Theconstruction thus far described is Each cylinder is provided with apiston 11 having-a central opening '12 controlled by .an upwardlyopening valve 13.. Each,

:1. piston rod 15,, the upper ends-o "the piston rods being connectedtoa, walking beam 16 pivoted at 17 on-an'upright between the two pumpcylinders. Each piston ll-comprises 19, 20, and 21 may be of metal or ofother material. The disks 18, 19, 20, 21 and. 22 are of considerablyless diameter than the interior diameter of the pump cylinder.

Specification of'Letters Patent.

Application filed May 13, 1911.

Patented Feb. 20, 1912.

Serial No. 626,981.

Between disks 19 and 20 is a disk 23 of flexible material such asleather or rubber and between disks 20 and 21 is a similar disk 24.

The disks 23 and 24 are of somewhat larger diameter than the interiordiameter of the pump cylinder and their outer edges are turned upward asshown. The upper and lower disks 18 and 22 are provided at points 25-andbetween each pair of arms is journaled a rol1er'26. Four or more pairsof arms 26 are preferably provided on each of the disks 18 and 22. Thearms 26 of disk 18 are preferably inclined upward and on the peripherywith pairs of radial arms the arms 26 of the disk 23 are preferablyinclined downward. The rollers 26 bear against the interior walls of thepump cyl-- inder as the piston is reciprocated and re duce thefrictioii'of the piston to the least possible and by reason of theseparation of the disks 18 and 22 and the inclination of the arms 25 ofthese disks the piston is pre-' vented from turning or twisting in thepump cylinder.

It will of course be understood that our invention'is not limited to itsuseincon'nection with double action pumps or even to use with liftpumps, but is applicable to any pump in which'a reciprocating piston is;

.1.A piston-adapted tofreciprocate in a cylinder, rollers distributedabout the pec linder, rollers distributed about the pe- 90 riphery ofthe upper and lower faces of said I piston and adapted to bear againstthe'interior wells of said cylinder.

2. A piston ado. ted to reciprocate in a I riphery of the upper andlower faces ofsaid I piston and adapted to bear against the'in-'- teriorwalls of said cylinder, a disk of fiexi ble material, of" reaterdiameter than that of the cylinder, oeated between the'upper andlowerfaces of said pistonl 3. A piston adapted to reciprocate in acylinder, comprising a series of disks of less diameter than that of theinterior of the cylinder, radial arms carrying rollers distributed aboutthe periphery of the upper and lower disks of said cylinder.

4. A piston adapted to reciprocate in a cylinder, comprising a series ofdisks of less diameter than that of the interior of the cylinder, radialarms carrying rollers dis tributed about the periphery of the upper andlower disks of said piston and adapted to bear against the interiorWalls of the cylinder, and disks of flexible material, of

piston, and adapted greater diameter than that of the interior to bearagainst the interior walls of the of the cylinder held between the disksof less diameter than that of the interior of the cylinder.

ADONIS M. PRINCE. LOUIA GOSCIA. W itnesses:

RICHARD HARGRAVE, Leon A. STROUD, IRA M. SAINT, GLO. B. COLEMAN.

